Samuel h



'SAMUEL A'n.fromlfM, `orr Tieren, INDIANA, Assienonjfro HIMSELF "AND :MARION.n (3L-Annen SAME PLAGE.

Laim Pan/ttm; 76,132, ma March si, 1868.

IMPRDVBly'lENT IN POSPT-HOL HOLLOW AUGBRS.

ro ALLv WHoM 1r MAY contenait:

Be it `known that i, SAMUEL H. YQCUM, of Tipton, in the county of Tipton, and State of Indiana, have `invented certain new and nsefullmprovetrients in Hollow Angers, adapting them for excavating purposes, which I have described in -the following speciiication and illustrated in the accompanying drarvings with sufficient rclearness to enable others of competent skill to maire and use my invention. v

AMy invention consists-in the arrangement and combination of parts, hereinafter described, by which- I adapt the hollow auger for excavating purposes bythe arrangement of adjustable cutters n the4 bottom of a hollow auger, so that after boring in the earth any given depth, by reversing the motion of the auger,the core may be cut off, and supported in its place by the cutters whilebeing lifted out, when,by a sudden turn forward, tnecutters will adjust themselves to their places vin the 'cirele'of the anger, leaving the lump of earth thus circumscribed free'to pass out.

I construct my hollow anger in any of the known forms. A

Figure 1, inthe accompanying drawings, represents a hollowauger, D, with as small a portion extending up tothe handle as is consistent with strength and durability, and to obviate friction in operating, rim P P is of sufticientthickness to attach bit F, i

On the bottom ofthe riml P P, I attach my invention, consisting oi' adjustable cutters :v :v2 x2, as shown atv Pig-nres, 3, 45, and 5, in the drawings. l Vattach adjustable cutters, :l:2 x2, by pivots n n at the rounded end, to rim P P, and are let in th'ebottouil of rim P P the thickness of thc cutters. Principal cutters, n x, are pivoted at the rounded ends by the pivots n n to rim P P, and extend over slots vl'ii Il in eutters'e:2 x2. 'Pin K, as shown in Figure 8,'is firmly fastened in prin'cipal'cutters, x-fr,.and entends through the slots H H in cutters :v2 x2.

Havingthns'i'ully described my invention, the nature of its operation is as follows: I take hold of liandlevA, attached to the top of sha-nh B, then turn to the right,`and bits FF will circuu1- scribe a circle equal to the circumference of the auger D. Continue to turn until it cuts any' desired depth. Iv then reverse`the motien of the auger and adjustable cutters'zz: a; and :v2 'm2, By the press'u-re of the dirt on the cutters, theywill be forcedinto the position as shown at' tig. 3 in the drawings, thereby cutting off the core circumscribed by auger D, and while they are in the position as show n'at fig. 3, raise the auger out of the hole, and then, by a *sudden motion ot' the auger to the right, together yvith the pressure of the core on the cutters :c :v 62 9,62, they are caused to resume their position,'as shown at fig. 2 in the drawings.

I do not claim the hollow auger D and bits F F, as'it is an old and Well-known device; butA What I 'do claim,rand desireto secure by Letters Patent, is.

1. Principal cutters; :zx-x, pivoted on rimv PP by pivots n n, in combination with holloiv auger D.

2.1 claim cutters :v2 x2, ivi-th slots H H, in combination with pin K in principal cutters :u fr, substantially as herein set forth and for the purposes specified. SAMUEL H. -YOGUM Witnesses; A

THOMAS E. Bnacnnn,

' -Jacon I. Yonne, 

